What color is Sidewall (USA) ?

Source Crayola® CSS3 CSS4
#5a8394
 
#757575
sonic silver
#708090
slate gray
#708090
slategrey
#303d44
 
#414a4c
outer space
#2f4f4f
dark slate gray
#2f4f4f
darkslategrey
#42616e
 
#4a646c
deep space sparkle
#696969
dim grey
#696969
dimgrey
#cfe2e9
 
#c5d0e6
periwinkle
#dcdcdc
gainsboro
#dcdcdc
gainsboro